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#ifndef _JPEG_INTERNAL_H_
#define _JPEG_INTERNAL_H_
#include "jpeg.h"
#include "huffman.h"
#include "bits.h"
#include "jpeg_debug.h"
//#define N_COMPONENTS 256
#define JPEG_N_COMPONENTS 4
typedef struct jpeg_scan_struct JpegScan;
#define JPEG_ENTROPY_SEGMENT 0x0001
#define JPEG_LENGTH 0x0002
struct jpeg_decoder_struct {
int width;
int height;
int depth;
int n_components;
bits_t bits;
int width_blocks;
int height_blocks;
int restart_interval;
unsigned char *data;
unsigned int data_len;
struct{
int id;
int h_oversample;
int v_oversample;
int h_subsample;
int v_subsample;
int quant_table;
unsigned char *image;
int rowstride;
} components[JPEG_N_COMPONENTS];
short quant_table[4][64];
HuffmanTable *dc_huff_table[4];
HuffmanTable *ac_huff_table[4];
int scan_list_length;
struct{
int component_index;
int dc_table;
int ac_table;
int quant_table;
int x;
int y;
int offset;
}scan_list[10];
int scan_h_subsample;
int scan_v_subsample;
/* scan state */
int x,y;
int dc[4];
};
struct jpeg_scan_struct {
int length;
int n_components;
struct {
int index;
int dc_table;
int ac_table;
}block_list[10];
};
/* jpeg.c */
int jpeg_decoder_sof_baseline_dct(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_define_quant_table(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_define_huffman_table(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_sos(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_soi(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_eoi(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_application0(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_application_misc(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_comment(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_restart_interval(JpegDecoder *dec, bits_t *bits);
int jpeg_decoder_restart(JpegDecoder *dec, bits_t *bits);
void jpeg_decoder_decode_entropy_segment(JpegDecoder *dec, bits_t *bits);
#endif
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